Pew Charitable Trusts’ Stateline quoted Professor Ann Carlson, co-director of the Emmett Institute on Climate Change and the Environment, on California’s increased resistance to President Trump’s environmental actions. The president’s next move is to repeal the Obama-era Clean Power Plan, as well as fuel-efficiency and tailpipe-emission standards for cars. “This would be a huge lawsuit battle. There’s no question that this would be litigated,” said Carlson.